Why C loop input structure elements could go wrong?-CodePudding

Input: aa aa, left behind without input, and can't display properly, especially the cycle 3. What are the reasons?
I know that is the reason of cin, but I don't understand why is cin, I change cin getline, and will have new problems,

Code:

 
//structur. CPP -- -- a simple structure 
#include  
#include  
Struct inflatable//structure declaration 
{
char name[20]; 
Float volume; 
double price; 
}; 

Int main () 
{
using namespace std; 
Inflatable guest=
{
"Glorious Gloria",//the name value 
1.88,//volume value 
29.99//price value 
};//guest is a structure variable of type inflatable 
//It 's an initialized to the indicated values 
Inflatable Pal=
{
"Audacious Arthur," 

 3.12,32.99 
};//Pal is a second variable of type inflatable 
//NOTE: some implementations require using 
//static inflatable guest=

Cout & lt; <"Expand your guest list with" & lt; Cout & lt; <"And" & lt; //Pal. The name is the name member of the Pal variable 
Cout & lt; <"You can have both for $"; 
Cout & lt; //cin. The get (); 

//my structure array test 
Inflatable guest_array [3]. 
for (int i=0; i <3; I++) 
{
Cout & lt; <"Both Please input the name:" & lt; //cin. Getline (guest_array [I]. Name, 20). 
Cin & gt;> Guest_array [I]. Name; 

Cout & lt; <"Both Please input volume:" & lt; Cin & gt;> Guest_array [I]. Volume; 

Cout & lt; <"Both Please input price:" & lt; Cin & gt;> Guest_array [I]. Price; 

Cout & lt; <"Name:" & lt; Cout & lt; <"Volume:" & lt; Cout & lt; <"Price:" & lt; } 


return 0; 
}

CodePudding user response:

For each data input, and press enter

CodePudding user response:

reference 1/f, Simple, Soft reply:

for each data input, just press enter

Screenshot of the 3 don't understand what's wrong,

CodePudding user response:

You know the debugged

CodePudding user response:

reference 3 floor is Simple - Soft reply:

debug once you know the

Because debugging don't understand just post

CodePudding user response:

Don't consider this question, I figure out in another post "c + + how to ensure that the input is always Numbers rather than the character", loop input digital or character is my purpose,
https://bbs.csdn.net/topics/396698161

The final code:

//my_structur. CPP - create an array of structure, loop input structure element, 
//1 create structure; 
//2 create an array of structure. 
//3 input loop structure elements to ensure always input string or number. 
//3.1 while (1) {} 
#include  
#include  
Struct inflatable//structure declaration 
{
char name[20]; 
Float volume; 
double price; 
}; 

Int main () 
{
using namespace std; 
//my structure array test 
Inflatable guest_array [3]. 
for (int i=0; i <3; I++) 
{
Cout & lt; <"Both Please input the name:" & lt; //cin. Getline (guest_array [I]. Name, 20). 
//cin> Noskipws & gt;> Guest_array [I]. Name; 

Cin. Get (guest_array [I]. Name, 20). 

Cout & lt; <"Both Please input volume:" & lt; while (! (cin & gt;> Guest_array [I]. Volume)) 
{
Cout & lt; <"Invalid input! Please enter the Numbers again: "& lt; Cin. The clear (); 
Cin. Ignore (1024), '\ n'); 
} 

//while (! The scanf (" % d ", & amp; Guest_array [I]. Volume) | | guest_array [I]. Volume & lt; 0) 
//{
//printf (" invalid input! Please input again: \ n "); 
//the scanf (" % * [^ \ n] "); 
//the scanf (" % * c "); 
//} 

Cin. The get (); 

Cout & lt; <"Both Please input price:" & lt; Cin & gt;> Guest_array [I]. Price; 
Cin. The get (); 

Cout & lt; <"Name" & lt; Cout & lt; <"Volume:" & lt; Cout & lt; <"Price:" & lt; } 

return 0; 
}